package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexPatterns;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;
import java.util.Date;
import java.util.HashMap;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

//    @Override
//    public Result sendCode(String phone, HttpSession session) {
//        //1.校验手机号
//         if (RegexUtils.isPhoneInvalid(phone)){
//             return Result.fail("手机号格式错误");
//         };
//        //2.生成验证码
//        String code = RandomUtil.randomNumbers(6);
//        //3.保存验证码到session
//        session.setAttribute("code",code);
//        //4.发送验证码
//        log.debug("发送短信验证码成功，验证码：{}"+code);
//        //5.返回结果
//        return Result.ok();
//    }


    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if (RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式错误");
        };
        //2.生成验证码
        String code = RandomUtil.randomNumbers(6);
        //3.保存验证码到redis中
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,code,LOGIN_CODE_TTL, TimeUnit.MINUTES) ;
        //4.发送验证码
        log.debug("发送短信验证码成功，验证码：{}"+code);
        //5.返回结果
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        if (RegexUtils.isPhoneInvalid(loginForm.getPhone())){
            return Result.fail("手机号格式错误");
        };
        //2.校验验证码
        if (RegexUtils.isCodeInvalid(loginForm.getCode()) || !loginForm.getCode().equals(stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+loginForm.getPhone()))){
            return Result.fail("验证码错误");
        }
        //3.查询用户
        User user = query().eq("phone", loginForm.getPhone()).one();
        //4.不存在，创建新用户并保存
        if (user == null){
            user = new User();
            user.setPhone(loginForm.getPhone());
            user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX+RandomUtil.randomString(10));
            user.setCreateTime(LocalDateTime.now());
            user.setUpdateTime(LocalDateTime.now());
            save(user);
        }
        //6.保存用户信息到redis中
        //6.1生成token
        String token = UUID.randomUUID().toString(true);
        //6.2将用户信息转为hash格式
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        //6.3保存到redis中
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY+token,BeanUtil.beanToMap(userDTO,
                new HashMap<>(),
                CopyOptions.create().setIgnoreNullValue(true).setFieldValueEditor((fileName,fileValue) -> fileValue.toString())));
        //设置登录有效期
        stringRedisTemplate.expire(LOGIN_USER_KEY+token,LOGIN_USER_TTL,TimeUnit.MINUTES);
        //7.返回token
        return Result.ok(token);
    }
}
